Catalina Island, California - Unlike what you might think, the population of Catalina Island Foxes was not nearly wiped out by humans. In fact, it was an epidemic of Canine Distemper on the tiny island chain that nearly caused the extinction of this species. Catalina Island, which lies just off the coast of Southern California was never really home to that many foxes in the first place, which made them susceptible targets for endangerment in the first place. Thanks to conservation efforts in the past 16 years, their population has grown back to its healthy range.
A combines effort of vaccination and captive breeding has helped to bring back the population of Island Foxes on Catalina Island. (Image from Wikipedia)